Recent content by John Mulcahy

Builds updated today (beta 88) with these changes: Added: Option to overlay the EBU RT60 limits on the RT60 Overlays graph Added: Control for the nominal RT60 value for the EBU limits overlay Added: "Show reflection limits" option for the Impulse and Filtered IR graphs to overlay the thresholds...

The time axis flip was being affected by the frequency axis setting, the result of an unfortunate typo while I was extracting the strings for language support. Fixed in the next build, available shortly.

Yes, the API should allow Offset t=0 as long as the measurement has phase data. I'll fix that for the next beta build.

In beta 87, just uploaded, the nominal RT60 is 300 ms. I have made it adjustable for the next build, and added the limits feature on the overlay RT60 graph. The tolerance has to be in the same units as the RT60 graph.

Beta 87 uploaded with these changes: Added: graphs.properties bundle entries for the 3D plot settings Added: Option to overlay the EBU RT60 limits on the RT60 graph Fixed: Null pointer exception when selecting overlay graphs

The next beta build:

Most of these are on the to-do list. I've made a change in the latest beta build so that generating the RT60 decay graph also runs the model fit, it's more difficult to do the other way around.

Builds updated today (beta 86) with these changes: Added: 3D plot option for the waterfall and spectrogram data Changed: Generating the RT60 Decay graph waterfall will also run the model fit Fixed: An error could occur in target match if, after applying a shelf filter, the response no longer...

Looks like the channels have a fractional sample timing offset.

The generator calibration shows the maximum output at full scale is 2.07 volts. Either it wasn't calibrated correctly or that is the full scale voltage of the output device, which may be different to full scale voltage of the input device.

REW uses the input full scale voltage calibration data (see Calibrating the input level) to match the channels.

The SPL logger can capture SPL values for very long periods, logging to daily files. If you need to capture low frequencies use Z weighting, the usual weighting curves (A and C) roll off low frequencies, very strongly in the case of A weighting. That is capturing overall acoustic levels, to see...

The SPL meter needs to be calibrated to show correct SPL figures. You can turn off the abort for excessive SPL on the Measure dialog. -6 dBFS is a very high input level for measurement, unless you are measuring electronic equipment. Unstable input values are typically caused by the interface...

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You don't need a custom EQ to control the number of filters REW will use, it only uses those with the Auto option selected.